HST/ACS F850LP image of the J1030 field (north is up and east is to the left). The white strip running across a very bright star is the gap between the two ACS CCDs. The positions of the LUCI long-slit (1″ × 205″) observation of the FRII host and of the 60″ × 60″ MUSE pointing are shown as a dashed red rectangle and a white square, respectively. The 30″ × 30″ region observed with SOUL is shown as a black square. The yellow circles mark the FRII host at z = 1.699 (l1) and a star-forming galaxy at z = 1.697 (l2) that was found serendipitously along the LUCI slit. MUSE galaxies in the redshift range [1.687−1.697] are also shown as green circles and labeled (m1 − m6). The position of the z = 6.3 QSO SDSS J1030+0524 is also marked in magenta.